Plato, Laws 770a

πῶς γὰρ ἄν; οὐκοῦν ἐν τῷ νῦν παρόντι ποιητέον ἐμοὶ καὶ σφῷν τοῦτο; τὸ ποῖον δὴ λέγεις; ἐπειδὴ νομοθετεῖν μὲν μέλλομεν, ᾕρηνται δὲ ἡμῖν νομοφύλακες, ἡμεῖς δʼ ἐν δυσμαῖς τοῦ βίου, οἱ δʼ ὡς πρὸς ἡμᾶς νέοι, ἅμα μέν, ὥς φαμεν, δεῖ νομοθετεῖν ἡμᾶς, ἅμα δὲ πειρᾶσθαι ποιεῖν καὶ τούτους αὐτοὺς νομοθέτας τε καὶ νομοφύλακας εἰς τὸ δυνατόν.

He certainly would not. Must not we three act thus on the present occasion? What is it you mean? We are about to make laws, and Law-wardens have been appointed by us; therefore, since we are in the evening of life, while those compared to us are youthful, we should not only legislate, as we say, ourselves, but also make legislators, as well as Law-wardens, of these very same men, so far as we can.